IOTA/IOTA-ES occultation update for (4930) Rephiltim / UCAC4 334-201322 event on 2024 Oct 14, 00:42 UT Visible from Summary ------- On 2024 Oct 14 UT, the 33.906409434429 km diameter asteroid (4930) Rephiltim will occult a 11.6 mag star in the constellation Sagittarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.75 mag to 17.35 mag (the magnitude of the asteroid) for at most 2.030 seconds. This update is based on, astrometry for the asteroid kindly provided by the IAU Minor Planet Center. This work has made use of data from the European Space Agency (ESA) mission Gaia (http://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, http://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. The event at a glimpse ---------------------- * Rank: 99 * date and approx. time of event: 2024 Oct 14, 00:36 - 2024 Oct 14, 00:48 * geocentric midpoint of event [JD]: 2460597.52965700 * magnitude of target star: 11.61 * magnitude drop [mag]: 5.75 * estimated maximum duration [s]: 2.030 * Moon: 83 % sunlit, 43° distance * Sun: 87° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 35 * 1 sigma uncertainty interval [path widths]: +/- 0.18 * 1 sigma uncertainty interval [seconds]: +/- 2.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.016, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.016", 0.002", 99°) * approx speed of asteroid's shadow [km/s]: 16.9178 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 334-201322 by 4930 Rephiltim on 2024 Oct 14 Centre Star Star Sun Path Limits Error Limits Alt E. Longitude Latitude U.T. Alt Az Alt Limit 1 Limit 2 Limit 3 Limit 4 Crn o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " Latitude Latitude Latitude Latitude 175 0 0 15 40 33 0 36 33.8 0 114 65 15 30 8 .. .. .. 15 26 28 .. .. .. .... 176 0 0 15 14 22 0 36 33.8 1 114 65 15 3 57 15 24 48 15 0 17 15 28 29 0.03 177 0 0 14 48 5 0 36 34.0 2 115 65 14 37 39 14 58 31 14 33 59 15 2 12 -0.08 178 0 0 14 21 41 0 36 34.4 3 115 65 14 11 16 14 32 8 14 7 35 14 35 49 -0.12 179 0 0 13 55 12 0 36 34.8 4 115 65 13 44 46 14 5 39 13 41 5 14 9 20 -0.14 -180 0 0 13 28 38 0 36 35.4 5 115 65 13 18 12 13 39 5 13 14 31 13 42 46 -0.15 -179 0 0 13 2 0 0 36 36.1 6 116 65 12 51 33 13 12 26 12 47 53 13 16 7 -0.16 -178 0 0 12 35 18 0 36 37.0 7 116 65 12 24 51 12 45 44 12 21 11 12 49 25 -0.17 -177 0 0 12 8 33 0 36 38.0 9 116 64 11 58 6 12 18 59 11 54 26 12 22 40 -0.17 -176 0 0 11 41 46 0 36 39.2 10 116 64 11 31 19 11 52 12 11 27 39 11 55 53 -0.17 -175 0 0 11 14 57 0 36 40.5 11 117 64 11 4 31 11 25 24 11 0 50 11 29 5 -0.18 -174 0 0 10 48 8 0 36 41.9 12 117 63 10 37 42 10 58 34 10 34 1 11 2 15 -0.18 -173 0 0 10 21 18 0 36 43.4 13 117 63 10 10 52 10 31 44 10 7 11 10 35 25 -0.18 -172 0 0 9 54 29 0 36 45.1 14 117 63 9 44 3 10 4 55 9 40 23 10 8 36 -0.18 -171 0 0 9 27 41 0 36 47.0 15 117 62 9 17 16 9 38 7 9 13 35 9 41 48 -0.18 -170 0 0 9 0 56 0 36 48.9 16 117 62 8 50 30 9 11 21 8 46 50 9 15 2 -0.19 -169 0 0 8 34 13 0 36 51.0 17 118 61 8 23 48 8 44 38 8 20 8 8 48 19 -0.19 -168 0 0 8 7 33 0 36 53.3 18 118 60 7 57 9 8 17 58 7 53 28 8 21 39 -0.19 -167 0 0 7 40 58 0 36 55.6 19 118 60 7 30 34 7 51 22 7 26 54 7 55 3 -0.19 -166 0 0 7 14 27 0 36 58.2 21 118 59 7 4 3 7 24 51 7 0 24 7 28 32 -0.19 -165 0 0 6 48 2 0 37 0.8 22 118 59 6 37 39 6 58 26 6 33 59 7 2 6 -0.19 -164 0 0 6 21 43 0 37 3.6 23 118 58 6 11 21 6 32 7 6 7 41 6 35 47 -0.19 -163 0 0 5 55 32 0 37 6.5 24 119 57 5 45 9 6 5 54 5 41 30 6 9 34 -0.19 -162 0 0 5 29 28 0 37 9.5 25 119 56 5 19 6 5 39 50 5 15 27 5 43 29 -0.19 -161 0 0 5 3 32 0 37 12.7 26 119 56 4 53 11 5 13 53 4 49 32 5 17 33 -0.19 -160 0 0 4 37 45 0 37 16.0 27 119 55 4 27 25 4 48 6 4 23 46 4 51 45 -0.19 -159 0 0 4 12 8 0 37 19.4 28 119 54 4 1 48 4 22 28 3 58 10 4 26 7 -0.19 -158 0 0 3 46 41 0 37 22.9 29 119 53 3 36 22 3 57 1 3 32 44 4 0 39 -0.20 -157 0 0 3 21 25 0 37 26.6 30 119 52 3 11 7 3 31 44 3 7 29 3 35 22 -0.20 -156 0 0 2 56 21 0 37 30.4 31 120 52 2 46 4 3 6 39 2 42 26 3 10 17 -0.20 -155 0 0 2 31 29 0 37 34.3 32 120 51 2 21 12 2 41 47 2 17 35 2 45 24 -0.20 -154 0 0 2 6 50 0 37 38.3 34 120 50 1 56 34 2 17 7 1 52 57 2 20 44 -0.20 -153 0 0 1 42 25 0 37 42.4 35 120 49 1 32 9 1 52 40 1 28 33 1 56 18 -0.20 -152 0 0 1 18 13 0 37 46.7 36 120 48 1 7 59 1 28 28 1 4 22 1 32 5 -0.20 -151 0 0 0 54 16 0 37 51.0 37 120 47 0 44 3 1 4 30 0 40 26 1 8 7 -0.20 -150 0 0 0 30 35 0 37 55.5 38 120 46 0 20 22 0 40 48 0 16 46 0 44 24 -0.20 -149 0 0 0 7 9 0 38 0.0 39 121 45 - 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63 0 0 - 8 53 59 0 46 43.2 48 245 -39 - 9 3 43 - 8 44 16 - 9 7 8 - 8 40 50 -0.21 - 62 0 0 - 8 41 24 0 46 48.3 47 245 -40 - 8 51 8 - 8 31 40 - 8 54 34 - 8 28 14 -0.21 - 61 0 0 - 8 28 24 0 46 53.3 46 245 -41 - 8 38 9 - 8 18 39 - 8 41 35 - 8 15 13 -0.21 - 60 0 0 - 8 14 59 0 46 58.2 45 245 -42 - 8 24 45 - 8 5 13 - 8 28 11 - 8 1 47 -0.21 - 59 0 0 - 8 1 10 0 47 3.1 44 245 -43 - 8 10 56 - 7 51 23 - 8 14 23 - 7 47 56 -0.21 - 58 0 0 - 7 46 55 0 47 7.9 43 245 -45 - 7 56 43 - 7 37 8 - 8 0 10 - 7 33 40 -0.21 - 57 0 0 - 7 32 17 0 47 12.6 42 245 -46 - 7 42 5 - 7 22 28 - 7 45 33 - 7 19 1 -0.21 - 56 0 0 - 7 17 14 0 47 17.2 41 245 -47 - 7 27 3 - 7 7 25 - 7 30 31 - 7 3 57 -0.21 - 55 0 0 - 7 1 48 0 47 21.7 40 245 -48 - 7 11 38 - 6 51 57 - 7 15 6 - 6 48 29 -0.21 - 54 0 0 - 6 45 57 0 47 26.2 39 246 -49 - 6 55 48 - 6 36 6 - 6 59 17 - 6 32 37 -0.21 - 53 0 0 - 6 29 43 0 47 30.5 38 246 -50 - 6 39 35 - 6 19 51 - 6 43 4 - 6 16 22 -0.21 - 52 0 0 - 6 13 6 0 47 34.8 37 246 -51 - 6 22 59 - 6 3 13 - 6 26 28 - 5 59 44 -0.21 - 51 0 0 - 5 56 6 0 47 38.9 36 246 -52 - 6 6 0 - 5 46 12 - 6 9 29 - 5 42 42 -0.21 - 50 0 0 - 5 38 43 0 47 43.0 35 246 -53 - 5 48 38 - 5 28 48 - 5 52 8 - 5 25 18 -0.21 - 49 0 0 - 5 20 58 0 47 47.0 33 246 -54 - 5 30 54 - 5 11 2 - 5 34 24 - 5 7 32 -0.21 - 48 0 0 - 5 2 51 0 47 50.8 32 246 -55 - 5 12 47 - 4 52 53 - 5 16 18 - 4 49 23 -0.21 - 47 0 0 - 4 44 21 0 47 54.6 31 246 -56 - 4 54 19 - 4 34 23 - 4 57 49 - 4 30 52 -0.21 - 46 0 0 - 4 25 30 0 47 58.2 30 246 -57 - 4 35 29 - 4 15 31 - 4 39 0 - 4 12 0 -0.21 - 45 0 0 - 4 6 18 0 48 1.8 29 246 -58 - 4 16 17 - 3 56 18 - 4 19 49 - 3 52 46 -0.20 - 44 0 0 - 3 46 45 0 48 5.2 28 246 -59 - 3 56 45 - 3 36 44 - 4 0 17 - 3 33 12 -0.20 - 43 0 0 - 3 26 51 0 48 8.6 27 246 -60 - 3 36 52 - 3 16 49 - 3 40 24 - 3 13 16 -0.20 - 42 0 0 - 3 6 37 0 48 11.8 26 246 -61 - 3 16 39 - 2 56 34 - 3 20 12 - 2 53 1 -0.20 - 41 0 0 - 2 46 3 0 48 14.9 25 246 -62 - 2 56 7 - 2 35 59 - 2 59 39 - 2 32 26 -0.20 - 40 0 0 - 2 25 10 0 48 17.9 24 246 -63 - 2 35 14 - 2 15 5 - 2 38 47 - 2 11 32 -0.20 - 39 0 0 - 2 3 58 0 48 20.7 23 246 -64 - 2 14 3 - 1 53 52 - 2 17 37 - 1 50 18 -0.20 - 38 0 0 - 1 42 27 0 48 23.5 22 246 -66 - 1 52 33 - 1 32 20 - 1 56 7 - 1 28 46 -0.20 - 37 0 0 - 1 20 38 0 48 26.1 21 246 -67 - 1 30 45 - 1 10 30 - 1 34 19 - 1 6 56 -0.20 - 36 0 0 - 0 58 31 0 48 28.6 20 246 -68 - 1 8 40 - 0 48 23 - 1 12 14 - 0 44 48 -0.20 - 35 0 0 - 0 36 8 0 48 31.0 19 246 -69 - 0 46 17 - 0 25 58 - 0 49 51 - 0 22 23 -0.20 - 34 0 0 - 0 13 27 0 48 33.2 18 246 -70 - 0 23 37 - 0 3 17 - 0 27 12 0 0 19 -0.20 - 33 0 0 0 9 30 0 48 35.4 16 246 -71 - 0 0 41 0 19 41 - 0 4 16 0 23 17 -0.20 - 32 0 0 0 32 42 0 48 37.4 15 246 -72 0 22 31 0 42 55 0 18 55 0 46 31 -0.20 - 31 0 0 0 56 10 0 48 39.2 14 246 -73 0 45 58 1 6 23 0 42 22 1 10 0 -0.20 - 30 0 0 1 19 53 0 48 41.0 13 246 -74 1 9 39 1 30 7 1 6 3 1 33 43 -0.20 - 29 0 0 1 43 49 0 48 42.6 12 246 -75 1 33 35 1 54 4 1 29 59 1 57 41 -0.20 - 28 0 0 2 8 0 0 48 44.0 11 246 -76 1 57 45 2 18 15 1 54 8 2 21 52 -0.20 - 27 0 0 2 32 23 0 48 45.4 10 246 -77 2 22 7 2 42 39 2 18 30 2 46 17 -0.20 - 26 0 0 2 56 59 0 48 46.6 9 246 -78 2 46 42 3 7 16 2 43 5 3 10 53 -0.20 - 25 0 0 3 21 46 0 48 47.6 8 246 -80 3 11 29 3 32 4 3 7 51 3 35 42 -0.20 - 24 0 0 3 46 45 0 48 48.6 7 246 -81 3 36 27 3 57 3 3 32 49 4 0 41 -0.20 - 23 0 0 4 11 54 0 48 49.3 6 246 -82 4 1 36 4 22 13 3 57 58 4 25 52 -0.20 - 22 0 0 4 37 14 0 48 50.0 5 246 -83 4 26 55 4 47 33 4 23 16 4 51 12 -0.19 - 21 0 0 5 2 42 0 48 50.5 4 246 -84 4 52 23 5 13 3 4 48 44 5 16 42 -0.19 - 20 0 0 5 28 20 0 48 50.9 2 246 -85 5 18 0 5 38 41 5 14 21 5 42 20 -0.19 - 19 0 0 5 54 6 0 48 51.1 1 246 -86 5 43 45 6 4 27 5 40 6 6 8 6 -0.18 - 18 0 0 6 19 59 0 48 51.2 0 247 -87 6 9 37 6 30 20 6 5 58 6 34 0 -0.08 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 334-201322 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 19 39.8295 DE: -23 17 06.393 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 19 39.8295 DE: -23 17 06.393 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.6 * B mag [mag]: 13.0 * Diameter [mas]: 0.20 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (4930) Rephiltim asteroid class: approx. diameter [km]: 34 approx. diameter ["]: 0.015 distance from Earth [AU]: 3.17530 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#52 date of fit: 2023 Apr 25 source of used astrometry: MPC, JPL number of used observations: 0 number of rejected observations: 0 time covered by the observations: 1800 Jan 01 - 1800 Jan 01 1 sigma uncertainty ellipse (major, minor, PA): 0.016", 0.002", 98.925° remarks: * orbital elements for (4930)Rephiltim : Mean anomaly = 186.4546945422 deg Arg. of pericenter = 358.1497034335 deg Long. of node = 122.0762529446 deg Inclination = 15.5354383808 deg Eccentricity = 0.0525448079 Semimajor axis = 3.1218720409 AU Perihelion dist = 2.9578338741 AU Mag: H = 11.33, G = 0.15 Epoch of elements : MJD 60597.02965704 TDT (2024 Oct 14.0297) ------ occelmnt file for Occult BEGIN ----------------------------------- <Occultations> <Event> <Elements>JPL#522023Apr25,2.03,2024,10,14,0.711768,0.017850,0.206850,9.512278,-0.835332,0.005799,0.000804,0.000000,0.000000</Elements> <Earth>-103.4500,-23.2404,165.82,-8.26,False</Earth> <Star>UCAC4 334-201322,19.32773043,-23.2851092,13.03,11.61,10.84,0.2,4,,19.35256518,-23.2404309,5.74,6.06,0,0,0</Star> <Object>4930,Rephiltim,17.35,34.367,3.1753,0,0,1.912,-2.31,,1.6,0</Object> <Orbit>0,186.2707,2024,10,13,358.1497,122.0763,15.5354,0.05254,3.12187,2.95783,11.33,5.0,0.15</Orbit> <Errors>1.176,0.0160,0.0024,99,0.0026,Known errors,1.01,0,-1,-1</Errors> <ID>20241014_201322,60140.63</ID> </Event> </Occultations> ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:10 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org